Dobby for looms for weaving.



E. H'OLLINGWORTH.'

DOBBY FOB, LOOMS FOB WEAVING.

APPLICATION FILED JAN. 26,-1910.

E. HOLLINGWORTH. 'BOBBY Fon LooMs FOR WEAVING.

APPLIOATION FILED JAN. 26,' 1910.

Patented July 12, 1910.

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E. HOLLINGWORTH. BOBBY FOR LooMs POR WBAVIM APPLICATION FILED JAN. 26, 1910 Patented July 12, 1910.

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EDWARD HOLLINGW'ORTH, OF DOBCROSS, ENGLAND, ASSIGNOR T0 CROMPTON & KNOWLES LOOM WORKS, A CORPORATION OF MASSACHUSETTS.

DOBBY FOR LOOMS FOR WEAVING.

To all whom tt may concern:

Be it known that I, EDWARD HOLLING- woRTH, a subject of King Edward VII of Great Britain, and resident of Dobcross, in the county of York, England, have invented certain new and useful Improvements in Dobbies for Looms for Veaving, of which the following description, in connection with the accompanying` drawings, is a specification.

This invention relates to loom dobbies and particularly to the Knowles type of dobby or head motion in which vibrator gears are moved, according to selection, into mesh with upper or lower cylinder gears and rotated thereby in one direction or the other to raise or lower the healds or boxes.

My improvements comprise the provision of simple and eflicient means for positively actuating the vibrator levers to raise or lower the vibrator gears carried thereby and to lock said parts in each position to which they are moved.

Referring to the drawings Figure 1 is an outside elevation of a dobby having my improvements applied; Fig. 2 is a sectional elevation of the dobby, showing two sets of vibrator levers` and connected parts, the framework, for the sake of clearness, being omitted, and Fig. 3 is a similar view to Fig. 2 but shows some of the parts in different positions.

In the accompanying drawings, 1 represents the framework, 2 the upper cylinder gear fast on the shaft 2, and 3 the lower cylinder gear, fast on the shaft 3. The means for driving the cylinder gears are not shown as these may be of any suitable known construction. The vibrator levers are shown at 4, 4, pivoted at on-e end on a fixed rod 4 and carrying vibrator gears 42, 42, connected in the usual manner by connections 5, 5, to the jack levers 6, 6, pivoted on the fixed rod 7.

8 represents a pattern barrel, in this instance driven from the bottom cylinder shaft 3', through bevels 9 and 10, shaft 11 .carrying a .wiper pin 12, and a star wheel 13 fast on the shaft of the barrel 8 and adapted to be engaged by the pin 12 at each revolution of the shaft 3 to intermittently rotate said barrel.

The above parts are or may be all of known construction and form no part of my invention which, as before stated, relates to means Specication of Letters Patent.

Application led January 26, 1910.

Patented July 12, 1910.

Serial No. 540,139.

for positively actuating the vibrator levers 4, to place' the vibrator gears 42 carried thereby into gear with either the top cylinder gear 2 or the bottom cylinder gear 3 and to lock said parts in each position to which they are moved.

According to my invention, I employ for each vibrator' lever 4, a suitably shaped lever 14, pivoted at its upper end on a fixed bar 15 and having its lower free end enlarged or extended rearwardly and formed with a cam slot 14 comprising, as shown in the drawings, an upper horizontal portion, a downwardly inclined portion leading therefrom, and terminating in a lower horizontal portion.

Formed on or attached to the side of the respective vibrator lever 4, adjacent each lever 14, is a stud or pin 43 which enters and is free to work in the cam slot 14. To each slotted lever 14 I pivotally connect a suitably shaped arm or hook lever 1G having uper and lower catches or hooks 16 and 162 ormed respectively on its upper and lower edges.

Mounted respectively on rock shafts 17 and 18 journaled in bearings in the framework 1 and located respectively above and below the hooked arms or levers 16 are blades or lingers 19 and 20 which have a constant oscillatory motion imparted to them and are adapted to engage with the respective upper or lower hooks on the levers 16 according to the positions of the latter.

The blades or lingers 19 and 20 are actuated in this instance by means of a cam 21 (see Fig. 1) mounted on the shaft 2 of the top cylinder gear 2. A lever 22 loosely mounted to rock in this instance on the projecting end of the fixed bar 15 carries at one end a roll 22 adapted to run in the cam groove 21 of the cam 21, and is connected at its other end to the upper end of a link 23 whose lower end is pivoted to a link 24 the upper and lower ends of which are pivoted respectively to levers or arms 17 and 18 respectively fast on the rock shafts 17 and 18. The movement of the cam 21, as the top cylinder gear rotates, causes the lever 22 to be rocked or oscillated, and this oscillatory motion is transmitted by the links 23, 24, and levers 1T and 1S to the shafts on which the blades or fingers 19 and 20 are mounted. I do not limit myself to this method of imparting oscillatory motion to the blades or fingers 19 and 20 as ist will be obvious to those skilled in the art that such motion may be obtained in a variety of ways, and that the blades may be dierently arranged to suit individual requirements. l

Pivoted on a fixed rod 25 are a series of indicator levers 26, 26, one for each hook lever. The rear ends of these indicator levers 26 extend over the pattern surfaces carried by the barrel 8, which according to the presence or absence of a peg 27, or other suitable indicating means, raises the rear ends of said indicator levers or allows them to occupy their lowest positions.

The absence of a peg allows the rear end of the indicator lever to drop, as shown by the front lever of the pair of indicator levers shown at Fig. 2, and raises the forward end 26 of said lever, which is adapted to engage the corresponding hook lever 16 and raise it, as shown, so that the upper hook 16 thereon is in the path of the upper oscillating blade 19. The blade 19 in its forward movement thus engages the hook 16 and forces the lever 16 in the same direction whereby the corresponding lever 14 is swung on its pivot also in the same direction.

As the lever 14 swings forward, the stud 43 on the corresponding vibrator lever 4 is acted on by the cam slot 14 and is moved from the position shown at Fig. 2, where it rests in the upper horizontal portion of the cam slot, to the position shown at FiO. 3, where it rests in the lower hori- ZontaI portion of said cam slot. The vibrator lever is thus swung on its pivot, and lowers its vibrator gear into a position to be engaged by the lower cylinder gear which in its rotation engages and partly rotates said gear in the usual way to draw down 'the healds or boxes, the final position of the parts being as shown by the front set of levers at Fig. 3.

The presentation of a peg in the pattern barrel under an indicating lever causes the rear end of the lever to be raised, as shown by the rear lever of the pair of such levers in Fig. 2, the forward end 26 of such lever being therefore depressed and allowing its corresponding hook lever to drop so that its lower hook 162 is in the path of and is engaged by the lower oscillating blade 2O as said blade makes its rearward movement. The hook lever is thus forced from the position shown at Fig. 2 to the position shown at Fig. 3, and swings its corresponding lever 14 rearwardly, causing the cam slot 14 thereon to act on the stud of its corresponding vibrator lever and raise said lever so that its vibrator gear is raised into position to be engaged by the upper cylinder gear in its next rotation whereby the position of its corresponding jack lever will e changed from that shown at Fig. 2 to that shown at Fig. 3, as will be well understood.

In each extreme position to which the vibrator levers and their gears are moved, the parts are positively locked by the cam slots 14 and studs 43 and a separate locking knife or bar is therefore unnecessary.

In the arrangement shown, the vibrator levers 4 are, for the sake of convenience, pivoted on the opposite side of the cylinder gears from that which is usual. The said levers may, however', if preferred, be arranged as at present, and the studs for working in the cam slots be applied at a convenient point between the heel or pivot of the vibrator lever and the vibrator gear.

The required movements of the vibrator levers and gears are by the above means positively brought about by the action of cam surfaces on studs carried by the vibrator levers, the motion being simple, effective, easily applied, and by means of said cam surfaces, effectually locking the parts at each extremity of movement.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a head motion of the type referred to, harness levers, vibrator levers, vibrator gears connected thereto, upper and lower cylinder gears, a bar on which one end of each of said vibrator levers is pivoted, means to positively raise and lower the other ends of said vibrator levers, said means including pivotally mounted levers having cam slots therein, and pattern controlled devices for operating said last mentioned levers.

2. In a head motion of the type referred to, harness levers, vibrator levers, vibrator gears connected thereto, upper and lower cylinder gears, a bar on which one end of each of said vibrator levers is pivoted, means to positively raise and lower, and lock the other ends of said vibrator levers, said means including pivotally mounted levers, having` cam slots therein, and pattern controlled devices for operating said last mentioned levers.

3. In a head motion of the type referred to, harness levers, vibrator levers, vibrator gears connected thereto, upper and lower cylinder gears, a bar on which one end of each of said vibrator levers is pivoted, means to positively raise and lower the other ends of said vibrator levers, said means including devices having cam slots therein, and pattern controlled devices for operating said devices.

4. In a head motion of the type referred to, harness levers, vibrator levers, vibrator gears connected thereto, and upper and lower cylinder gears, and means for locking said vibrator levers at each extremity of their movement, said means comprising a stud or projection on each vibrator lever, and a pivoted lever provided with a cam slot engaged by said stud or projection, a hook lever, pivoted at one end on said lever provided with a cam slot, and having an Lipper and lower hook thereon, a pattern controlled indicator lever to move said hook lever, to carry the upper or lower hook thereon into the path of oscillating blades or fingers, and said oscillating blades or fingers.

5. In a head motion of the type referred to, harness levers, vibrator levers, vibrator gears connected thereto, and upper and lower cylinder gears, and means for locking said vibrator levers at each extremity of 'their movement, said means comprising a stud or projection on each vibrator lever, and a pivoted lever provided with a cam. slot engaged by said stud or projection, a hook lever pivoted at one end on said lever provided with a cam slot, land `having' an upper and lower hook thereon, a pattern controlled indicator lever to move said hook lever, to carry the upper or lower hook thereon into the path ot oscillating blades or fingers, and said oscillating blades or fingers, and means for moving said blades or fingers.

6. In a dobby or head mot-ion, the combination with upper and lower cylinder gears,

and vibrator levers carrying vibrator gears adapted to be putin mesh with one or other of said gears, of a stud or projection extending from the side of each vibrator lever, respective pivoted levers having cam slots in their lower ends into which the stud or projection on the respective vibrator lever enters, a hooked lever pivotally connected to each slotted lever and having a hook or shoulder on the upper and lower edges thereof, pattern controlled levers engaging with and adapted to move the hooked levers vertically, and oscillating bladeshor lingers into the path of one or other of which one of the hooks or shoulders on the hooked levers is moved to be engaged thereby and through said levers to move the slotted levers and raise or lower the vibrator levers, the eXtreme ends of the cam slots locking the parts at the extent of movement in each direction of the slotted levers.

In testimony whereof I atiX my signature in the presence of two witnesses.

EDWARD I-IOLLINGIVORTH.

Vitnesses FRANK BROOK, THOMAS H. BARRON. 

